Tree now confusing

Tree now confusing

I made a complete mess of my tree and had to download the backup copy that I’d saved in FTM 2014. However, I now find that I’ve got more people in the tree than I originally had as more seem to have been added. But, those that have been added also say they’re related to me when I click on the “relationship to you” option. Is this possible, or have things gone very badly wrong somewhere?